No results from promise in Express Routing

Question

I'm using NodeJS, Express and GoogleApis en Google-oauth-jwt to authenticate.

I'm having problems with getting data from my second promise function (getData).

I can succesfully retrieve a token, when I use res.json(myToken) in the getToken().then(function(myToken). However I'm having problems using this token in the getData(token) function.

When I'm finally able to retrieve data from the googleapis via the getData function,I'd like to save this data into a MongoDB, to reduce calls to the Google Analytics API.

These are the errors I get:

2018-01-11T09:46:55.063Z 5ac2c6f1-f6b4-11e7-a2e2-c50e9f880e28 token: XXXXXXXXXXXXXXX

2018-01-11T09:46:55.148Z 5ac2c6f1-f6b4-11e7-a2e2-c50e9f880e28 { Error: Login Required at RequestError.Error (native) at new RequestError (/var/task/node_modules/google-auth-library/lib/transporters.js:34:42) at Request._callback (/var/task/node_modules/google-auth-library/lib/transporters.js:96:27) at Request.self.callback (/var/task/node_modules/request/request.js:186:22) at emitTwo (events.js:106:13) at Request.emit (events.js:191:7) at Request. (/var/task/node_modules/request/request.js:1163:10) at emitOne (events.js:96:13) at Request.emit (events.js:188:7) at IncomingMessage. (/var/task/node_modules/request/request.js:1085:12) code: 401, errors: [ { domain: 'global', reason: 'required', message: 'Login Required', locationType: 'header', location: 'Authorization' } ] }

2018-01-11T09:46:55.153Z 5ac2c6f1-f6b4-11e7-a2e2-c50e9f880e28 (node:1) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: Login Required

This is my code:

var express = require('express');
var router = express.Router();
var googleAuth = require('google-oauth-jwt');
var google = require('googleapis');
var app = express();

/* get GA data*/
router.get('/kpis', function(req, res, next) {
  // get token with googleapis library
  function getToken() {
       return new Promise(function(resolve,reject) {
         googleAuth.authenticate({
           email: 'serviceAcountemail@email.com',
           key: "getting key",
           scopes: ['https://www.googleapis.com/auth/analytics.readonly']
           }, function (err, token) {
            if (err){
              reject(err)
            } else
             resolve(token)
          });
       });
   }

   function getData(token){
     return new Promise(function(resolve,reject){
       var analytics = google.analytics('v3');
       var VIEW_ID = 'ga:profileid';
       analytics.data.ga.get({
           'auth': token,
           'ids': VIEW_ID,
           'metrics': 'ga:uniquePageviews',
           'dimensions': 'ga:pagePath',
           'start-date': '30daysAgo',
           'end-date': 'yesterday',
           'sort': '-ga:uniquePageviews',
           'max-results': 10,
       }, function (err, response) {
           if (err) {
             console.log(err)
             reject(err)
           } else
             console.log('Response:',response)
             resolve(response)

       });
    });
   }

   getToken().then(function(myToken) {
     // get the token, make a call to google analytics api with token included in auth
     console.log('token:', myToken);
     getData(myToken).then(function(results){
        // show results on screen in json
        res.json(gaResults);
     });
   });
});
/* end of get GA data*/
module.exports = router;

My question: